Faucet coupling



FIG. 1 is a perspective view of a faucet coupling showing my new design;

FIG. 2 is a front elevational view, the rear being a mirror image of the front shown;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side shown;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a faucet coupling, as shown and described. 